We receive Jesus' love when we accept Him as our Savior and Lord. That's the beginning of a life of joy. But to experience complete joy, we need to give Christ's love to others. That means loving others the way that Jesus has loved us.
Is it possible to love like Jesus? Not if we rely on our own strength, but Jesus didn't rely on His own strength either when He walked the earth as a man. He said that He couldn't do anything without God's direction and help. His love required Him to remain in humble obedience to His Father God.
In the same way, we can't love like Jesus unless we rely on the Holy Spirit to guide and empower us. We have to keep our minds and our hearts connected to Him through constant prayer and reading His Word. We have to trust Him by doing what He tells us to do. In that way, we become like branches that are connected to a vine. Our direction, our power, and our joy come from the Holy Spirit.